Update:
Another bylaw officer arrived. After taking photographs they started to remove the dogs.
Unfortunately, as they were taking the second last dog, the last one jumped off the tailgate still tethered. The tether was just long enough to get to the edge of the tailgate, leaving the dog hanging from it's neck. The bylaw officer quickly acted to loosen the tether around it's neck, but as a result it ran off once free.
Heads up to anyone in Lake Bonavista or Willow Park/SouthCentre area, keep an eye out for this pup.